调节pH值对剩余污泥与餐厨垃圾混合产酸的影响  

Effect of Adjusting pH on Volatile Organic Acids Produced by Mixing Waste Activated sludge and Kitchen Waste

作　　者：苑宏英 毕豪杰[1,2] 杨召峰 杜永亮 YUAN Hongying;BI Haojie;YANG Shaofeng;DU Yongliang(School of Environmental and Municipal Engineering,TCU,Tianjin 300384,China;Tianjin Key Laboratory of Aquatic Science and Technology,TCU,Tianjin 300384,China)

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津城建大学天津市水质科学与技术重点实验室,天津300384

出　　处：《天津城建大学学报》2024年第6期398-402,共5页Journal of Tianjin Chengjian University

基　　金：国家重点研发计划“政府间国际创新合作”专项项目(2019YFE0122400);天津市水质科学与技术重点实验室项目(KJZHZ-CA-1754)。

摘　　要：近年来,我国城镇的污废水量和生活垃圾快速增长,剩余污泥、餐厨垃圾等固体废弃物也随之急剧增加,对环境造成了不利影响.将剩余污泥与餐厨垃圾中的有机物转换成脂肪酸,既能减少固体废弃物的危害,又能实现资源化利用.本文研究了不同pH值对污泥与餐厨垃圾混合后产酸的影响.结果表明,强碱环境(pH10.0)有利于短链脂肪酸(SCFAs)的溶出,最大值为132.3 mgCOD/g TS.餐厨垃圾分别经超声和高温高压预处理后与剩余污泥混合,与未预处理相比,预处理通过改变污泥理化性质,加快了有机质的溶出.在pH8.0环境下,SCFAs达最大值,分别为771 mgCOD/g TS(超声)、691 mgCOD/g TS(高温高压).In recent years,the amount of wastewater and domestic waste in Chinese cities and towns has increased rapidly,and the solid wastes such as surplus sludge and kitchen waste have also increased rapidly,which has adversely affected the environment.The conversion of organic matter from surplus sludge and kitchen waste to fatty acid can not only reduce the harm of solid waste,but also realize resource utilization.The effects of different pH values on the acid production of sludge mixed with kitchen waste were studied.The results showed that the strong alkali environment(pH10.0)was conducive to the dissolution of short chain fatty acids(SCFAs),with a maximum value of 132.3 mgCOD/g TS.The food waste was mixed with the residual sludge after pretreatment by ultrasound and high temperature and pressure respectively.Compared with the unpretreatment,the pretreatment can accelerate the dissolution of organic matter by changing the physical and chemical properties of sludge.At pH8.0,SCFAs reached the maximum value,which were 771 mgCOD/g TS(ultrasonic)and 691 mgCOD/g TS(high temperature and high pressure),respectively.

关 键 词：剩余污泥 餐厨垃圾 短链脂肪酸 资源化 

分 类 号：X705[环境科学与工程—环境工程]